a floating freshwater plant with creeping stems which bear clusters of small rounded leaves 水鳖,马尿花
Two species in the family Hydrocharitaceae: Eurasian frogbit (Hydrocharis morsus-ranae) and American frogbit (Hydromystria laevigatum) 水鳖科中两种: 欧亚马尿花(拉丁名Hydrocharis morsus-ranae)和美洲马尿花(拉丁名Hydromystria laevigatum)